On the spectral functions of scalar mesons
| dc.creator | Giacosa, Francesco | |
| dc.creator | Pagliara, Giuseppe | |
| dc.date | 2007-07-24 | |
| dc.date | 2007-07-25 | |
| dc.date.accessioned | 2026-07-07T11:18:05Z | |
| dc.date.available | 2026-07-07T11:18:05Z | |
| dc.description | In this work we study the spectral functions of scalar mesons in one- and two-channel cases. When the propagators satisfy the Källen-Lehman representation a normalized spectral function is obtained, allowing to take into account finite-width effects in the evaluation of decay rates. In the one-channel case, suitable to the light sigma and k mesons, the spectral function can deviate consistently from a Breit-Wigner shape. In the two-channel case with one subthreshold channel the evaluated spectral function is well approximated by a Flatte' distribution; when applying the study to the a_0(980) and f_0(980) mesons the tree-level forbidden KK decay is analysed. | |
| dc.description | 13 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/0707.3594 | |
| dc.identifier | http://arxiv.org/abs/0707.3594 | |
| dc.identifier | Phys.Rev.C76:065204,2007 | |
| dc.identifier | doi:10.1103/PhysRevC.76.065204 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/193223 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | On the spectral functions of scalar mesons | |
| dc.type | text |